EP3247541B1 - Wallboard punch assembly with stripper bushings - Google Patents
Wallboard punch assembly with stripper bushings Download PDFInfo
- Publication number
- EP3247541B1 EP3247541B1 EP16703866.0A EP16703866A EP3247541B1 EP 3247541 B1 EP3247541 B1 EP 3247541B1 EP 16703866 A EP16703866 A EP 16703866A EP 3247541 B1 EP3247541 B1 EP 3247541B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stripper
- bushings
- wallboard sheet
- assembly
- holes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004080 punching Methods 0.000 description 14
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000012634 fragment Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
- B26F1/14—Punching tools; Punching dies
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/04—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like
- E04B9/0464—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like having irregularities on the faces, e.g. holes, grooves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/01—Means for holding or positioning work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/48—Producing shaped prefabricated articles from the material by removing material from solid section preforms for forming hollow articles, e.g. by punching or boring
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F2210/00—Perforating, punching, cutting-out, stamping-out, severing by means other than cutting of specific products
- B26F2210/02—Perforating, punching, cutting-out, stamping-out, severing by means other than cutting of specific products of stacked sheets
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
- E04B2001/8245—Machines for manufacturing, shaping, piercing or filling sound insulating elements
Definitions
- At least one pilot pin 30 is attached to and extends upwardly from the die plate 20 to help align and position the wallboard sheet 18 relative to the upper and lower assemblies 14, 16.
- the pilot pin 30 has a body 32 with a tapered top end 34 to facilitate the engagement of the pilot pin with an alignment recess or hole 36 in the wallboard sheet 18.
- the punches 84 move through the respective through-holes 68 and the heads 80 of the bolts 70 move upwardly within the recesses 76 in the upper member 38. Initially, the punches 84 move through the pre-cut openings in the upper or top face paper layer on the wallboard sheet 18 to form clean, non-fragmented holes through the face paper layer. The punches 84 continue to move through the wallboard sheet 18 and at least partially move into the respective die bushings 22.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forests & Forestry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Electromagnetism (AREA)
- Acoustics & Sound (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Building Environments (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Description
- The present application relates generally to wallboard manufacturing machines used in producing wallboard, and more particularly to such machines used for punching or stamping holes in wallboard.
- Wallboard is cut into various sizes and shapes to correspond to the size and shape of a surface or wall on which the wallboard is being mounted. In some instances, patterns of holes or other openings are made in wallboard panels for obtaining enhanced acoustical properties or for other purposes. In an example, a punch press is used to form the holes. Conventional wallboard punch presses typically include a die bushing plate and a stripper plate, where a sheet or panel of wallboard is positioned between the die bushing plate and the stripper plate. The die bushing plate supports the wallboard sheet and includes a plurality of holes that are aligned with the locations of the holes to be formed in the wallboard. The stripper plate is positioned on top of the wallboard sheet and includes holes that are aligned with the hole locations in the wallboard and the holes in the die bushing plate. The punch press includes a plurality of typically cylindrical punches that are aligned with the holes in the stripper plate. The punches, which may be simultaneously, sequentially or individually moved, are driven downwardly through the holes in the stripper plate, through the wallboard and at least partially through the holes in the die bushing plate, and then return to the initial position spaced from the wallboard sheet. The result of the punching operation is that the wallboard sheet includes one or more holes having a shape that corresponds to the shape of the punches.
- Wallboard commonly has paper facing sheets on each side of the gypsum core to provide strength and rigidity to the wallboard. In a typical punching operation, portions of the paper facing sheet on the top surface or surface initially contacted by the punches extends into the respective hole openings because the bottom surfaces of the punches are flat and form 90° corners with the shaft or sidewall of the punches. As a result of the punching process, portions or fragments of the facing paper extend into the holes leave an unclean look that often requires the extending paper portions to be manually trimmed after completion of the punching process. Furthermore, punches having bottom surfaces with teeth configured to pierce the facing paper before the punches move through the wallboard sheet do not remedy the above problem.
- An apparatus for providing precise small holes at predetermined positions on a printed circuit board is disclosed in
JP 2007 030127 A - Accordingly, there is a need for a wallboard punching machine that cleanly punches through the face paper on both sides of a wallboard sheet.
- The present disclosure provides a punch assembly that includes one or more stripper bushings each having a piercing edge and a plurality of punches configured to move through the stripper bushings and all layers of a wallboard sheet or panel. The piercing edge on each of the stripper bushings is moved against the wallboard sheet prior to the punches moving through the stripper bushings and the wallboard sheet to pre-cut openings in the upper face paper layer on the wallboard sheet and provide clean upper and lower openings associated with each of the holes punched in the wallboard sheet. The resultant clean holes enhance the aesthetic appearance and acoustic properties of the wallboard sheet.
- In an embodiment, a punch assembly for creating clean holes in a wallboard sheet having at least one surface with a face paper layer is provided and includes a frame having a lower assembly configured to support the wallboard sheet where a plate on an upper frame assembly being reciprocable relative to the at least one surface of the wallboard sheet at least one stripper bushing is connected to the plate. Included in the at least one stripper bushing are a hole and a piercing edge and at least one punch configured to move through the hole in the at least one stripper bushing. In operation, the plate is moved against the at least one surface of the wallboard sheet so that the piercing edge of the at least one stripper bushing contacts the face paper layer and at least partially cuts the face paper layer prior to the at least one punch moving through the wallboard sheet to form at least one clean hole in the wallboard sheet.
- In another embodiment, a punch assembly for creating clean holes in a wallboard sheet having opposing upper and lower face paper layers is provided and includes a frame, a die plate including a plurality of die bushings configured for supporting the wallboard sheet, each of the die bushings including a hole. A stripper plate is vertically reciprocable against the upper surface of the wallboard sheet and includes a plurality of stripper bushings that are connected to the stripper plate. Each of the stripper bushings includes a hole and a piercing edge. A plurality of punches are aligned with corresponding holes in the stripper bushings and the die bushings, and are configured for moving through the holes in the stripper bushings and the die bushings. In operation, the stripper plate is moved against the upper face paper layer of the wallboard sheet so that the piercing edges of each of the stripper bushings contact and at least partially cut the upper face paper layer prior to the punches moving through the holes in the stripper bushings, the wallboard sheet and at least partially into the holes in the die bushings to respectively form a plurality of clean holes in the wallboard sheet.
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FIG. 1A is a fragmentary, partial section view of the present punch assembly where the upper assembly is in a first position relative to the lower assembly; -
FIG. 1B is a fragmentary, partial section view of the present punch assembly where the upper assembly is in a second position relative to the lower assembly; -
FIG. 2A is a fragmentary, side view of a punch of the punch assembly ofFIG. 1 where the punch is in a first position above a wallboard sheet; -
FIG. 2B is a fragmentary, side view of the punch ofFIG. 2A where the punch is in a second position partially through the wallboard sheet; -
FIG. 2C is a fragmentary, side view of the punch ofFIG. 2A where the punch is in a third position fully through the wallboard sheet; -
FIG. 3A is a bottom view of a stripper bushing having a continuous piercing edge; -
FIG. 3B is a bottom view of a stripper bushing having a non-continuous piercing edge; -
FIG. 4 is a top view of an embodiment of a wallboard sheet produced by the punch assembly ofFIG. 1 ; -
FIG. 5 is a cross section of the wallboard sheet ofFIG. 4 taken along line 5-5 inFIG. 4 and in the direction generally indicated; and -
FIG. 6 is another embodiment of a wallboard sheet produced by the punch assembly ofFIG. 1 . - The present punch assembly forms one or more holes through a wallboard sheet in different patterns. A feature of the present assembly is that each hole is formed cleanly through the wallboard sheet with less face paper fragments and cracking at the hole openings.
- Referring now to
FIGs. 1A ,1B ,2A, 2B, 2C and4 , the punch assembly generally designated asreference number 10 includes aframe 12, alower assembly 14 attached to the frame and anupper assembly 16 movably connected to theframe 12 where theupper assembly 16 reciprocates relative to thelower assembly 14 to punch or stamp holes in a wallboard sheet orpanel 18 placed upon thelower assembly 14. - The
lower assembly 14 includes adie plate 20 mounted to theframe 12 and at least one die bushing, and preferably, a plurality ofdie bushings 22 removably attached to thedie plate 20. In the illustrated embodiment, thedie plate 20 and diebushings 22 are made of a durable material such as steel. It should be appreciated that thedie plate 20 and thedie bushings 22 may be made out of any suitable material or combination of materials. Each of thedie bushings 22 has an outer diameter and a through-hole 24 with a designated inner diameter. Thedie bushings 22 support thewallboard sheet 18 and form abottom opening 26 of eachhole 28 made in thewallboard sheet 18. During a punching or stamping operation, at least onepilot pin 30 is attached to and extends upwardly from thedie plate 20 to help align and position thewallboard sheet 18 relative to the upper andlower assemblies FIG. 1A , thepilot pin 30 has abody 32 with a taperedtop end 34 to facilitate the engagement of the pilot pin with an alignment recess orhole 36 in thewallboard sheet 18. - The
upper assembly 16 includes anupper member 38 attached to a hydraulic ram portion or ram 40 of thepunch assembly 10 that is movably connected to theframe 12. Preferably, theram 40 includes one or more hydraulic pistons (not shown) each attached to theupper assembly 16 that reciprocally move the upper assembly relative to thelower assembly 14 in upward and downward strokes. Astripper plate 42 is spaced from and positioned below theupper member 38. Thestripper plate 42 is a generally rectangular plate made of steel or other suitable material that includes at least one, and preferably a plurality of holes 44 (FIGs. 2A-2C ) arranged in a desired pattern. Theholes 44 are configured to have a designated shape and inner diameter to each receive astripper bushing 46. Each stripper bushing 46 has acylindrical body 48 with abottom end 50 having a piercingedge 52, and atop end 54 having aflange 56 integrally formed with thebody 48, where the flange has an outer diameter that is greater than an outer diameter of the body. A bushing backing plate 57 (FIGs. 1A and1B ) is placed on top of the stripper bushings 46 to help hold these bushings in place during operation. - In one embodiment shown in
FIGs. 2A and3A , the piercingedge 52 is a single, continuous beveled, sharpened edge formed about the periphery of the bottom ends 50 of each of the stripper bushings 46. Alternatively in another embodiment, as shown inFIG. 3B , the piercingedge 52 is a non-continuous, beveled, sharpened edge having one or more segments or sections. Each of theholes 44 in the stripper plate has an upper end with a recessed portion 58 (FIGs. 2A-2C ) including an outer diameter that is greater than the outer diameter of therespective hole 44 to enable each of the stripper bushings 46 to be seated in a correspondinghole 44 such that thetop surfaces 60 of thestripper bushings 46 are flush with thetop surface 62 of thestripper plate 42. - As shown in
FIGs. 1A ,1B ,2A, 2B and 2C , the piercingedge 52 extends at least partially beyond thebottom surface 64 of thestripper plate 42 to engage thewallboard sheet 18 being punched or stamped by thepunch assembly 10. A flat,rectangular plate 66 made of steel or other suitable material is placed upon thestripper plate 42 and thestripper bushings 46, and includesholes 68 each having an inner diameter that corresponds with the inner diameter of theholes 44 in the stripper bushings 46. Theflat plate 66 helps to hold and secure thestripper bushings 46 in thestripper plate 42 during operation of thepunch assembly 10. - A plurality of supports, such as
bolts 70, interconnect theupper member 38 with thestripper plate 42. Each support orbolt 70 includes abottom end 72 attached to thestripper plate 42 and atop end 74 that is reciprocally movably positioned in acorresponding recess 76 formed in theupper member 38. Specifically, thetop end 74 of eachbolt 70 includes abody 78 and ahead 80, where the head has an outer diameter that is greater than an outer diameter of the body as shown inFIG. 1A . - Additionally, a plurality of guide pins 94 further interconnect the
upper member 38 and thestripper plate 42 where each guide pin includes abottom end 96 fixedly attached to thestripper plate 42 and atop end 98 slidably connected to theupper member 38. Theupper member 38 includes a plurality ofholes 100 corresponding to the size and shape of the top ends 98 of the guide pins 94. A plurality ofguide bushings 102 are each removably inserted in a respective one of theholes 100. Eachguide bushing 102 includes aninner surface 104 having machined grooves that receive and hold a lubricant. Theguide bushings 102 each define a through-holes 106 each having an inner diameter that is greater than the outer diameter of the guide pins 94 such that the guide pins reciprocally slide within theguide bushings 102. The guide pins 94 further support the connection between theupper member 38 and thestripper plate 42 and help to maintain the orientation ofupper member 38 relative to thestripper plate 42 so that thepunches 84 remain aligned with the corresponding holes in thestripper plate 42 and thedie plate 20. - In operation, the
ram 40 moves theupper assembly 16 downwardly against thewallboard sheet 18. Initially, thehead 80 of eachbolt 70 is positioned at the bottom ends 82 of thecorresponding recess 76. When thestripper plate 42 of theupper assembly 16 engages thewallboard sheet 18, theram 40 continues to move theupper member 38 downwardly to apply pressure on thestripper plate 42 and thereby thewallboard sheet 18. This pressure causes thehead 80 of the eachbolt 70 to move upwardly within the respective recesses 76. - Once the piercing
edges 52 engage thewallboard sheet 18, theram 40 retracts theupper assembly 16 upwardly away from thelower assembly 14. Also, theupper member 38 moves upwardly until thehead 80 of each of thebolts 70 contacts the bottom ends 82 of therespective recesses 76, which causes theupper member 38 to pull upwardly on each bolt to simultaneously pull upwardly on thestripper plate 42 and move thestripper plate 42 away from thewallboard sheet 18. - Referring now to
FIGs. 1A ,1B and2A-2C , at least one and preferably a plurality of punching rods or punches 84 are attached to theupper member 38. In the illustrated embodiment, each of thepunches 84 has a cylindrical cross-sectional shape but it should be appreciated that thepunches 84 may each have the same shape or different shapes. Also, thepunches 84 may have square-shaped cross-sectional shape or have any suitable cross-sectional shape. Thepunches 84 each have an outer diameter that is less than the respective inner diameters of theflat plate 66,stripper plate 42, thestripper bushings 46, thedie plate 20 and thedie bushings 22 so that the punches can move reciprocally through the through-holes 68 formed by the aligned holes in theflat plate 66, thestripper bushings 46, thestripper plate 42, thedie plate 20 and thedie bushings 22. Eachpunch 84 has a length that enables the punch to extend fully through thewallboard sheet 18 during each downward stroke of theupper assembly 16. It should be appreciated that thepunches 84 may have any suitable length and may have a length that enables the punches to extend partially through or fully through awallboard sheet 18. - At least one biasing
member 86 is attached to theupper member 38 and biases thestripper plate 42 against thewallboard sheet 18 until theram 40 moves theupper member 38 from a first position or contact position shown inFIG. 1A to a second position or non-contact position shown inFIG. 1B . The biasingmember 86 includes ahousing 88 having at least one biasing device, such ascoil spring 90, which biases apost 92 such that the post maintains contact and tension on thestripper plate 42. Thepost 92 is movably connected to thehousing 88 and moves from a retracted position, where thepost 92 is engaged with the stripper plate 42 (FIG. 1A ), to a fully extended position, where the biasingmember 86, and thereby thepost 92, is moved away from and is not engaging thestripper plate 42. Specifically, the biasingmember 86 biases thestripper plate 42 against thewallboard sheet 18 during a punching or stamping operation until theupper assembly 16 moves away from thelower assembly 14 and thepunches 84 are spaced from or above thewallboard sheet 18. - Referring to
FIGs. 1A ,2A, 2B and 2C , in operation, theupper assembly 16, and more specifically, theupper member 38 is in an upper, non-contact position relative to thelower assembly 14. In this position, thepunches 84 are spaced from and above thewallboard sheet 18 to enable thewallboard sheet 18 to be placed in position on thedie plate 20 and aligned by thepilot pin 30 or indexed or advanced to another punch position on thedie plate 20. To punch or stamp one ormore holes 28 in thewallboard sheet 18, theram 40 moves theupper member 38, and thereby thestripper plate 42, downwardly toward thelower assembly 14. - As the
stripper plate 42 engages thewallboard sheet 18, the piercingedges 52 of each of thestripper bushings 46 engage thewallboard sheet 18 to pre-cut the face paper layer on the top surface of the wallboard sheet. Also, thepost 92 of the biasingmember 86 engages thestripper plate 42, causing the post to retract or push upwardly into thehousing 88 against the biasing force of thecoil spring 90 in thehousing 88. As such, the biasingmember 86 applies a downward biasing force or pressure on thestripper plate 42 to maintain the position of the stripper plate during a punching operation. Simultaneously, thepunches 84 move through the respective through-holes 68 and theheads 80 of thebolts 70 move upwardly within therecesses 76 in theupper member 38. Initially, thepunches 84 move through the pre-cut openings in the upper or top face paper layer on thewallboard sheet 18 to form clean, non-fragmented holes through the face paper layer. Thepunches 84 continue to move through thewallboard sheet 18 and at least partially move into therespective die bushings 22. The cutting clearance between the outer surfaces of thepunches 84 and the inner surfaces of thedie bushings 22 are configured to be in the range of 0,0025 cm to 0,0051 cm (0.0010 inches to 0.0020 inches) so that the bottom face paper layer on the bottom surface of thewallboard sheet 18 is cut cleanly. As such, little to no paper fragments are generated as thepunches 84 move through the bottom face paper layer. In the illustrated embodiment, the cutting clearance is 0,0038 cm (0.0015 inches) but may be any suitable clearance value. - Referring now to
FIG. 1B , after the punchedholes 28 are formed in thewallboard sheet 18, theram 40 moves theupper assembly 16 away from thelower assembly 14 causing thepunches 84 to move upwardly through the through-holes 68 and the biasingmember 86 to move upwardly away from thestripper plate 42. The biasing force or pressure on thestripper plate 42 is released when thepost 92 of the biasingmember 86 disengages from thetop surface 62 of thestripper plate 42. As theupper assembly 16 moves upwardly away from thelower assembly 14, theheads 80 of thebolts 70 move downwardly within therespective recesses 76 in theupper member 38. When theheads 80 contact the lower orbottom end 82 of therecesses 76, theupper member 38 lifts upwardly on theheads 80 and simultaneously lifts thestripper plate 42 upwardly away from thewallboard sheet 18. After thestripper plate 42 is disengaged from thewallboard sheet 18, thewallboard sheet 18 is moved to a next punch position or is removed from the punch assembly for further processing. The above process is repeated to form holes in thesame wallboard sheet 18 or in another wallboard sheet. - The punching assembly and process described above forms one or more pre-cut openings in the face paper layer on a top surface of a wallboard sheet prior to the punching assembly punching or stamping holes through the wallboard sheet so the clean and clear holes are formed in the wallboard sheet. As a result, the holes in the punched wallboard sheet do not include paper fragments protruding into the holes at the top and bottom surfaces of the wallboard sheet. Thus, a punched wallboard sheet is produced that has an enhanced aesthetic appearance and enhanced acoustical damping properties.
- While particular embodiments of the present punch assembly and methods of punching a wallboard sheet have been shown and described, it will be appreciated by those skilled in the art that changes and modifications may be made thereto without departing from the invention in its broader aspects as set forth in the following claims.
Claims (10)
- A punch assembly (10) for creating clean holes in a wallboard sheet (18) having at least one surface with a face paper layer, the punch assembly (10) including a frame having a lower assembly (14) configured to support the wallboard sheet (18), a plate (42) on an upper frame assembly (16) being reciprocable relative to the at least one surface of the wallboard sheet (18) and at least one punch (84);
wherein the punch assembly (10) is characterized by:at least one stripper bushing (46) connected to the plate (42), said at least one stripper bushing (46) including a hole (68) and a piercing edge (52);the at least one punch (84) configured to move through the hole (68) in the at least one stripper bushing (46),wherein in operation, the plate (42) is moved against the at least one surface of the wallboard sheet (18) so that the piercing edge (52) of the at least one stripper bushing (46) contacts the face paper layer and at least partially cuts the face paper layer prior to the at least one punch (84) moving through the wallboard sheet (18) to form at least one clean hole in the wallboard sheet (18). - The punch assembly (10) of claim 1, wherein the piercing edge (52) is a single continuous edge.
- The punch assembly (10) of claim 1, wherein the at least one stripper bushing (46) includes a body (48) having a top end (54) and a bottom end (50), a flange (56) projecting laterally outwardly from the top end (54) and the piercing edge (52) projecting from the bottom end (50).
- The punch assembly (10) of claim 3, wherein the body (48) has a cylindrical shape.
- The punch assembly (10) of claim 1, further comprising a die plate (20) on said lower assembly (14) positioned below the wallboard sheet (18) and configured for supporting the wallboard sheet (18).
- The punch assembly (10) of claim 5, further comprising a plurality of die bushings (22) removably attached to the die plate (20), wherein the die bushings (22) include holes (24) that are each aligned with a corresponding one of the holes (68) in the stripper bushings (46).
- The punch assembly (10) of claim 1, wherein the piercing edge (52) is a non-continuous edge.
- The punch assembly (10) of claim 1, wherein said at least one stripper bushing (46) is removably connected to the plate (42).
- The punch assembly (10) of claim 1, further comprising:a die plate (20) including a plurality of die bushings (22) configured for supporting the wallboard sheet (18), each of the die bushings (22) including a hole (24);a plurality of stripper bushings (46) connected to the plate (42) on the upper frame assembly (16), each of the stripper bushings (46) including a hole (68) and a piercing edge (52);a plurality of punches (84) aligned with corresponding holes (68,24) in stripper bushings (46) and the die bushings (22), and configured for moving through the holes (68, 24) in the stripper bushings (46) and the die bushings (22),wherein in operation, the plate (42) is moved against the upper face paper layer of the wallboard sheet (18) so that the piercing edges (52) of each of the stripper bushings (46) contact and at least partially cut the upper face paper layer prior to the punches (84) moving through the holes (68) in the stripper bushings (46), the wallboard sheet (18) and at least partially into the holes (24) in the die bushings to (22) respectively form a plurality of clean holes in the wallboard sheet (18).
- The punch assembly (10) of claim 9, further comprising at least one biasing device (86) attached to the upper frame assembly (16) and configured for biasing the stripper plate (42) against the wallboard sheet (18) when the upper assembly (16) is in the contact position.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL16703866T PL3247541T3 (en) | 2015-01-23 | 2016-01-13 | Wallboard punch assembly with stripper bushings |
HRP20192070TT HRP20192070T1 (en) | 2015-01-23 | 2019-11-18 | Wallboard punch assembly with stripper bushings |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/604,421 US11466453B2 (en) | 2015-01-23 | 2015-01-23 | Wallboard punch assembly with stripper bushings |
PCT/US2016/013128 WO2016118372A1 (en) | 2015-01-23 | 2016-01-13 | Wallboard punch assembly with stripper bushings |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3247541A1 EP3247541A1 (en) | 2017-11-29 |
EP3247541B1 true EP3247541B1 (en) | 2019-08-21 |
Family
ID=55346191
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16703866.0A Active EP3247541B1 (en) | 2015-01-23 | 2016-01-13 | Wallboard punch assembly with stripper bushings |
Country Status (14)
Country | Link |
---|---|
US (1) | US11466453B2 (en) |
EP (1) | EP3247541B1 (en) |
KR (1) | KR102212126B1 (en) |
CN (1) | CN107107370B (en) |
AU (1) | AU2016209592B2 (en) |
CA (1) | CA2974356C (en) |
DK (1) | DK3247541T3 (en) |
ES (1) | ES2756624T3 (en) |
HR (1) | HRP20192070T1 (en) |
HU (1) | HUE047182T2 (en) |
MX (1) | MX2017008871A (en) |
PL (1) | PL3247541T3 (en) |
PT (1) | PT3247541T (en) |
WO (1) | WO2016118372A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102016114314A1 (en) * | 2016-08-03 | 2018-02-08 | Sennheiser Electronic Gmbh & Co. Kg | Method for producing an acoustic resistance and acoustic resistance |
CN108215246B (en) * | 2018-03-09 | 2024-05-24 | 湖南航天环宇通信科技股份有限公司 | Forming tool for porous composite part and using method thereof |
CN110893437A (en) * | 2018-09-12 | 2020-03-20 | 无锡朗贤轻量化科技股份有限公司 | Punching device in hot forming die |
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- 2015-01-23 US US14/604,421 patent/US11466453B2/en active Active
-
2016
- 2016-01-13 MX MX2017008871A patent/MX2017008871A/en active IP Right Grant
- 2016-01-13 HU HUE16703866A patent/HUE047182T2/en unknown
- 2016-01-13 ES ES16703866T patent/ES2756624T3/en active Active
- 2016-01-13 AU AU2016209592A patent/AU2016209592B2/en not_active Ceased
- 2016-01-13 PT PT167038660T patent/PT3247541T/en unknown
- 2016-01-13 DK DK16703866T patent/DK3247541T3/en active
- 2016-01-13 EP EP16703866.0A patent/EP3247541B1/en active Active
- 2016-01-13 CN CN201680004708.1A patent/CN107107370B/en not_active Expired - Fee Related
- 2016-01-13 KR KR1020177021242A patent/KR102212126B1/en active IP Right Grant
- 2016-01-13 CA CA2974356A patent/CA2974356C/en active Active
- 2016-01-13 WO PCT/US2016/013128 patent/WO2016118372A1/en active Application Filing
- 2016-01-13 PL PL16703866T patent/PL3247541T3/en unknown
-
2019
- 2019-11-18 HR HRP20192070TT patent/HRP20192070T1/en unknown
Non-Patent Citations (1)
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None * |
Also Published As
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US20160215499A1 (en) | 2016-07-28 |
KR102212126B1 (en) | 2021-02-05 |
AU2016209592A1 (en) | 2017-08-24 |
KR20170109238A (en) | 2017-09-28 |
CA2974356A1 (en) | 2016-07-28 |
PT3247541T (en) | 2019-10-30 |
PL3247541T3 (en) | 2020-03-31 |
HRP20192070T1 (en) | 2020-02-07 |
WO2016118372A1 (en) | 2016-07-28 |
CN107107370B (en) | 2020-04-03 |
CN107107370A (en) | 2017-08-29 |
AU2016209592B2 (en) | 2020-08-27 |
CA2974356C (en) | 2023-08-08 |
HUE047182T2 (en) | 2020-05-28 |
ES2756624T3 (en) | 2020-04-27 |
MX2017008871A (en) | 2017-09-27 |
US11466453B2 (en) | 2022-10-11 |
DK3247541T3 (en) | 2019-11-25 |
EP3247541A1 (en) | 2017-11-29 |
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